Investigating bearing strength of pin-loaded composite plates in different environmental conditions

Abstract

Composites are subjected to different working environments when they are employed. In this study, the bearing strength and failure modes of composite-pinned joints subjected to various types of environments for different exposure times are investigated, experimentally. The specimens were divided into five categories which include cold environment, hot environment, humid environment, seawater environment, and room temperature. The test results were carried out after 1 and 2 months of exposure to different environmental conditions. A total of 540 test specimens with 20 different geometries were fabricated for the pin-bearing experiments. Two different geometrical parameters were investigated during analysis. The ratio of edge-distance-to-hole diameter and the ratio of the specimen width-to-hole-diameter were systematically varied and corresponding failure modes and loads were defined. The performance of the joints is closely related to changing in geometrical parameters. It was observed that different environment conditions did not change failure modes consisting of net tension, shear-out, bearing, and mixed, generally. Also, the experimental results show that the bearing strength of composite-pinned joints is affected at different levels when subjected to environmental conditions for various exposure times.

Pinned Hybrid Glass-Flax Composite Laminates Aged in Salt-Fog Environment: Mechanical Durability

“…Esendemir and Cabioglu [24] showed that different environmental aging conditions do not modify the failure modes (i.e., net tension, shear-out, bearing, and mixed) for woven glass epoxy pinned composites. Nevertheless, they evidenced that the bearing strength of the joints is noticeable affected by the applied environment conditions.…”

Rainwater effect on bearing strength of glass–epoxy laminated composite pinned joints

“…The same material was kept in the seawater with respect to one and two months in the other study. 18 The bearing strength reduced by a maximum of 10.71% and 17.91% for one and two months, respectively. The bearing strength of specimens immersed in seawater decreases its strength compared to a specimen immersed in rainwater.…”

An Aging Evaluation of the Bearing Performances of Glass Fiber Composite Laminate in Salt Spray Fog Environment

“…As already stated, several papers have been focused on the bearing behavior of fiber-reinforced, polymer-based materials. Nevertheless, a further relevant aspect which has attracted increasing attention in the last few years is the evaluation of joints' durability; i.e., the knowledge of how the bearing performance can be modified when composite joints are exposed to aggressive environments, such as marine ones [15][16][17][18][19][20].…”

“…Esendemir and Cabioglu [20] compared the effects of various types of environments on the bearing strength and failure modes of woven glass epoxy pinned composites. In particular, they exposed specimens (at varying edge distance to hole diameter and specimen width to hole diameter ratios) to a cold environment (i.e., −18 • C), hot environment (i.e., 30 • C), room temperature (i.e., 21 • C), humid environment (i.e., 70% RH) and seawater environment for a period of 2 months.…”